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- W3026440106 abstract "Broadband flat-top mid-infrared supercontinuum (SC) generation in optical fibers is of great interest for many applications. Here, we designed a microstructured chalcogenide optical fiber composed of hexagonal rings. By optimizing the structure parameters, it is demonstrated that the fiber is characterized by an all-normal dispersion profile. Numerical simulation results show that the generated SC spectrum with intensity above <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mo>−<!-- − --></mml:mo> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>3</mml:mn> </mml:mrow> </mml:mrow> <mml:mspace width=thickmathspace /> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>d</mml:mi> <mml:mi mathvariant=normal>B</mml:mi> </mml:mrow> </mml:mrow> </mml:math> ranges from 3450 nm to 8015 nm corresponding to more than one octave when the fiber is pumped with 150 fs pulses at 5 µm. By solving the generalized nonlinear Schrödinger equation, we investigated the influence of pump pulse parameters including pump wavelength, peak power, and pulse duration on the spectral broadening. The results turn out that the optimal pump wavelength is around 5 µm for obtaining SC spectra with sufficient flatness. High peak power and short duration enhance the spectral flatness and bandwidth. We also investigated SC generation in the optimized fiber pumped at 3 µm. The generated SC at <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mo>−<!-- − --></mml:mo> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>6</mml:mn> </mml:mrow> </mml:mrow> <mml:mspace width=thickmathspace /> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>d</mml:mi> <mml:mi mathvariant=normal>B</mml:mi> </mml:mrow> </mml:mrow> </mml:math> level covers wavelength from 1970 to 4370 nm, corresponding to more than one octave." @default.
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- W3026440106 date "2020-06-12" @default.
- W3026440106 modified "2023-10-17" @default.
- W3026440106 title "Ring-shaped microstructured chalcogenide optical fiber for octave-spanning flat-top mid-infrared supercontinuum generation" @default.
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- W3026440106 doi "https://doi.org/10.1364/ao.391564" @default.
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